Aubameyang’s Arsenal suffered a second chastening defeat in four days as Neal Maupay scored deep into injury time to give Brighton a 2-1 victory over the Gunners.
Nicolas Pepe put Mikel Arteta’s faltering side ahead on the 68th minute at the Amex Stadium with a stunning strike, but home defender Lewis Dunk capitalized on suspect Arsenal defending to level seven minutes later.
It looked set to end all square until Aaron Connolly cleverly helped the ball on to Maupay, who finished neatly.
It sparked an ugly incident as Maupay, who been in an aerial challenge with Arsenal keeper Bernd Leno in a first half clash which saw the German stretchered off in agony, was involved in an altercation with Matteo Guendouzi in a melee of players at the final whistle.
Maupay said after the match that he had not intended to hurt Leno, but had little sympathy for the rest of his teammates, claiming they “got what they deserved” for not showing more humility after the opening goal by Pepe.
Arsenal, which still had hopes of European qualification, lost 3-0 to Manchester City last Wednesday after having defender David Luiz sent off, and the latest defeat has left the north London giants in ninth place.
Earlier, relegation battlers Watford scored a last-gasp equalizer to deny third-placed Leicester City victory in a 1-1 draw at the Vicarage Road.
England full-back Ben Chilwell looked to have given the visitor victory with a stunning left-footed strike on 89 minutes, but Craig Dawson salvaged a precious point for the Hornets with an acrobatic overhead kick goal just a minute later.